The developmental time course and topographic distribution of individual-level monkey face discrimination in the infant brain
The developmental time course and topographic distribution of individual-level monkey face discrimination in the infant brain
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DOI：
10.1016/j.neuropsychologia.2017.11.019
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发表时间：
2018-01-08
期刊：
影响因子：
2.6
通讯作者：
Scott, Lisa S.
中科院分区：
文献类型：
--
作者：
Barry-Anwar, Ryan;Hadley, Hillary;Scott, Lisa S.
以前的研究发现，区分面孔和不熟悉面孔的能力在生命的第一年会下降。在这里，个人层面的歧视面孔在以前不熟悉的群体进行了调查，通过测量神经反应猴子的面孔。6个月和9个月大的婴儿（n = 42）完成了快速周期性视觉刺激（FPVS）的任务，而稳态视觉诱发电位（ssVEP）记录。使用古怪的任务设计（例如，面部识别的不频繁变化）的面部以6Hz（大约每167 ms一个面部）刺激速率呈现，并且每1.2Hz呈现不同的个体猴面部。在1.2 Hz的显着SNR在6个月和9个月大的婴儿表明，神经反应，记录在头皮后部区域，仍然敏感的个人水平的差异，在一个陌生的面孔组，尽管以前的行为证据减少歧视。然而，地形分布的1.2赫兹的反应不同的年龄，这表明，6个月和9个月大的婴儿正在使用不同的神经群体，以区分不熟悉的面孔在个人层面上。
The ability to discriminate between faces from unfamiliar face groups has previously been found to decrease across the first year of life. Here, individual-level discrimination of faces within a previously unfamiliar group was investigated by measuring neural responses to monkey faces. Six- and 9-month-old infants (n = 42) completed a Fast Periodic Visual Stimulation (FPVS) task while steady state visual evoked potentials (ssVEPs) were recorded. Using an oddball task design (e.g., infrequent changes in face identity) faces were presented at a 6 Hz (1 face approximately every 167 ms) stimulation rate and every 1.2 Hz different individual monkey faces were presented. Significant SNRs at 1.2 Hz in both 6- and 9-month-old infants suggest that neural responses, recorded over posterior scalp regions, remain sensitive to individual-level differences within an unfamiliar face group despite previous behavioral evidence of decreased discrimination. However, the topographic distribution of the 1.2 Hz response varied by age, suggesting that 6- and 9-month-old infants are using different neural populations to discriminate unfamiliar faces at the individual level.